next up previous contents
Next: Intransitive: Tnx0V Up: Verb Classes Previous: Where to Find What

Verb Classes

Each main6.1 verb in the syntactic lexicon selects at least one tree family6.2 (subcategorization frame). Since the tree database and syntactic lexicon are already separated for space efficiency (see Chapter 3), each verb can efficiently select a large number of trees by specifying a tree family, as opposed to each of the individual trees. This approach allows for a considerable reduction in the number of trees that must be specified for any given verb or form of a verb. There are currently 53 tree families in the system.6.3 This chapter gives a brief description of each tree family and shows the corresponding declarative tree6.4, along with any peculiar characteristics or trees. It also indicates which transformations are in each tree family, and gives the number of verbs that select that family.6.5 A few sample verbs are given, along with example sentences.


XTAG Project